Patents by Inventor Kazuko Kawabata

Kazuko Kawabata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Amorphous soft magnetic thin film
    Patent number: 4747888
    Abstract: An improved alloy used in the form of an amorphous soft magnetic thin film having a desirable combination of saturation magnetic flux density and saturation magnetostriction constant, the alloy having the compositional formula:Co.sub.x Zr.sub.y Pd.sub.zwherein:0.85.ltoreq.x.ltoreq.0.940.04.ltoreq.y.ltoreq.0.070.01.ltoreq.z.ltoreq.0.10.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: May 31, 1988
    Assignee: Sony Corporation
    Inventors: Hiroshi Takino, Kiyonori Hayakawa, Kazuko Kawabata, Makoto Tsuruoka
  • Amorphous soft magnetic thin film
    Patent number: 4615748
    Abstract: An improved amorphous soft magnetic material particularly useful as a thin film for a magnetic recording and reproducing head. The amorphous material has the formula:Co.sub.1-x-y Hf.sub.x Pd.sub.ywherex is in the range from 0.04 to 0.08 andy is in the range from 0.005 to 0.15.The thin film is characterized by a high saturation magnetic flux density and a low saturation magnetostriction constant.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: October 7, 1986
    Assignee: Sony Corporation
    Inventors: Hiroshi Takino, Kiyonori Hayakawa, Kazuko Kawabata, Makoto Tsuruoka